Adobe Co-Founder and Developer of PDF Charles Geschke Passes Away at 81. Toner News Mobile › Forums › Toner News Main Forums › Adobe Co-Founder and Developer of PDF Charles Geschke Passes Away at 81. Date: Monday April 19, 2021 12:49:03 pm This topic is empty. Viewing 1 post (of 1 total) Author Posts #294103 jimKeymaster Author April 19, 2021 at 12:49 PM Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In 0